This is the 5082nd most frequent Russian word.
молодёжной
Relating to youth or young people.
Here, 'молодёжной' is used as an adjective to describe 'публике' (audience), implying that the audience is young.
Молодёжной публике понравился концерт.
The young audience enjoyed the concert.
In this sentence, 'молодёжной' modifies 'программы' (program), indicating that the program is intended for young people.
Это здание используется для проведения молодёжной программы.
This building is used for hosting the youth program.
Here, 'молодёжной' describes 'команды' (team), specifying that the team is comprised of young members.